Jonners you can create new teams mate, it would take around the same time to just create the team from scratch than edit an existing one, the only thing is you will need to create a chairman and coaching staff also. as for the logo's you can change them, they just need to be created first then installed the normal way that you put new logo's/kits into the game.
if you need any help dont hesitate to add me on msn. | 
